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Investments (Tables)
 6 Months Ended
Jun. 30, 2013
Investments, Debt and Equity Securities [Abstract]  
Schedule of Investment
The investment balances at June 30, 2013 and December 31, 2012, consist of the following:
 
(in thousands)
 
June 30,
2013
 
December 31,
2012
Rabbi trust (associated with Supplemental Executive Retirement Savings Plan)
 
$
2,613

 
$
2,116

Rabbi trust (associated with certain directors' compensation)
 
89

 
39

Investments in equity securities
 
2,215

 
2,013

Total
 
$
4,917

 
$
4,168